XMP metadata
CAUTIONXMP (Extensible Metadata Platform) is the metadata standard used by Experience Manager Assets for all metadata management. XMP provides a standard format for the creation, processing, and interchange of metadata for a wide variety of applications.
Aside from offering universal metadata encoding that can be embedded into all file formats, XMP provides a rich content model and is supported by Adobe and other companies, so that users of XMP in combination with Experience Manager Assets have a powerful platform to build upon.
The XMP specification is available from Adobe.
What is XMP?
Experience Manager Assets natively supports the XMP - the Extensible Metadata Platform spearheaded by Adobe. XMP is a standard for processing and storing standardized and proprietary metadata in digital assets. XMP is designed to be the common standard that allows multiple applications to work effectively with metadata.
Production professionals, for example, use the built-in XMP support within Adobe’s applications to pass information across multiple file formats. The Experience Manager Assets repository extracts the XMP metadata and uses it to manage the content lifecycle and offers the ability to create automation workflows.
XMP standardizes how metadata is defined, created, and processed by providing a data model, a storage model, and schemas. All of these concepts are covered in this section.
All legacy metadata from EXIF, ID3, or Microsoft Office is automatically translated to XMP, which can be extended to support customer-specific metadata schema, such as product catalogs.
Metadata in XMP consists of a set of properties. These properties are always associated with a
particular entity referred to as a resource; that is, the properties are “about” the resource. In the case of XMP, the resource is always the asset.
Adobe
Adobe first introduced the XMP standard as part of the Adobe Acrobat software product. Since then, the XMP standard has been widely adopted.
XMP ecosystem
XMP defines a metadata model that can be used with any defined set of metadata items. XMP also defines particular schemas for basic properties useful for recording the history of a resource as it passes through multiple processing steps, from being photographed, scanned, or authored as text, through photo editing steps (such as cropping or color adjustment), to assembly into a final image. XMP allows each software program or device along the way to add its own information to a digital resource, which can then be retained in the final digital file.
XMP is most commonly serialized and stored using a subset of the W3C Resource Description Framework (RDF), which is in turn expressed in XML.
Advantages of XMP
XMP has the following advantages over other encoding standards and schemata:
- XMP-based metadata is very powerful and fine-grained.
- XMP lets you have multiple values for one property.
- XMP has standardized encoding, which lets you easily exchange metadata.
- XMP is extensible. You can add addtional information into your assets.
Extensible
The XMP standard is designed to be extensible, allowing you to add custom types of metadata into the XMP data. EXIF, on the other hand, does not - it has a fixed list of properties that cannot be extended.
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